UCTRONICS DC 6V 9V 12V 24V to DC 5V 5A Buck Converter Module, 9-36V Step Down to USB 5V Transformer Dual Output Voltage Regulator Board [2 Pack]

Power Supply: DC 9-36V; Output Voltage: 5-5.3V; Output Power: 18W to 30W (input DC 9-24V, output 5.2V/6A; input DC 24-32V, output 5.2V/5A; input DC 32-36V, output 5.2V/3.5A)
Input Port: 5.5mm×2.1mm DC socket and wiring terminal, each way makes the module work, can also be connected at the same time; Output Port: USB and wiring terminal, can output power at the same time.
High-efficient Transformation: the module adopts the new technology synchronous rectification, which improves conversion efficiency obviously and expands the working voltage and current.
Mini and Portable: 63 x 2 x 10mm, suitable for various narrow installation space and small case.
Application: as a USB 5V buck converter, DIY a phone charger, refit car charger, supply power to raspberry pi 4 b.